kc3-lang/angle/src/libANGLE/Framebuffer.h

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• Author : Jamie Madill
  Date : 2017-02-02 19:59:59
  Hash : fd3dd436
  Message : WebGL: Add 3D tex copying feedback loop detection. When copying to and from the same texture, we need to reject only the feedback loops formed with the same levels of the texture - copying between different unrelated layers and levels is fine. This change also fixes a couple bugs in our D3D11 CopyTexSubImage3D implementation. We were missing some "!" operators, and we actually would hit an ASSERT when trying to blit from a level of a 3D texture. BUG=angleproject:1685 Change-Id: Id715bebafe8336cf8bb95d0d06275a8b95e522e1 Reviewed-on: https://chromium-review.googlesource.com/425494 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>

• src/libANGLE/Framebuffer.h

• //
  // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // Framebuffer.h: Defines the gl::Framebuffer class. Implements GL framebuffer
  // objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.
  
  #ifndef LIBANGLE_FRAMEBUFFER_H_
  #define LIBANGLE_FRAMEBUFFER_H_
  
  #include <vector>
  
  #include "common/Optional.h"
  #include "common/angleutils.h"
  #include "libANGLE/Constants.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/FramebufferAttachment.h"
  #include "libANGLE/RefCountObject.h"
  #include "libANGLE/signal_utils.h"
  
  namespace rx
  {
  class ContextImpl;
  class GLImplFactory;
  class FramebufferImpl;
  class RenderbufferImpl;
  class SurfaceImpl;
  }
  
  namespace egl
  {
  class Surface;
  }
  
  namespace gl
  {
  class Context;
  class Framebuffer;
  class Renderbuffer;
  class State;
  class Texture;
  class TextureCapsMap;
  struct Caps;
  class ContextState;
  struct Extensions;
  struct ImageIndex;
  struct Rectangle;
  
  class FramebufferState final : angle::NonCopyable
  {
    public:
      FramebufferState();
      explicit FramebufferState(const Caps &caps);
      ~FramebufferState();
  
      const std::string &getLabel();
  
      const FramebufferAttachment *getAttachment(GLenum attachment) const;
      const FramebufferAttachment *getReadAttachment() const;
      const FramebufferAttachment *getFirstNonNullAttachment() const;
      const FramebufferAttachment *getFirstColorAttachment() const;
      const FramebufferAttachment *getDepthOrStencilAttachment() const;
      const FramebufferAttachment *getStencilOrDepthStencilAttachment() const;
      const FramebufferAttachment *getColorAttachment(size_t colorAttachment) const;
      const FramebufferAttachment *getDepthAttachment() const;
      const FramebufferAttachment *getStencilAttachment() const;
      const FramebufferAttachment *getDepthStencilAttachment() const;
  
      const std::vector<GLenum> &getDrawBufferStates() const { return mDrawBufferStates; }
      GLenum getReadBufferState() const { return mReadBufferState; }
      const std::vector<FramebufferAttachment> &getColorAttachments() const
      {
          return mColorAttachments;
      }
  
      bool attachmentsHaveSameDimensions() const;
      bool colorAttachmentsAreUniqueImages() const;
  
      const FramebufferAttachment *getDrawBuffer(size_t drawBufferIdx) const;
      size_t getDrawBufferCount() const;
  
    private:
      friend class Framebuffer;
  
      std::string mLabel;
  
      std::vector<FramebufferAttachment> mColorAttachments;
      FramebufferAttachment mDepthAttachment;
      FramebufferAttachment mStencilAttachment;
  
      std::vector<GLenum> mDrawBufferStates;
      GLenum mReadBufferState;
      std::bitset<IMPLEMENTATION_MAX_DRAW_BUFFERS> mEnabledDrawBuffers;
  };
  
  class Framebuffer final : public LabeledObject, public angle::SignalReceiver
  {
    public:
      // Constructor to build application-defined framebuffers
      Framebuffer(const Caps &caps, rx::GLImplFactory *factory, GLuint id);
      // Constructor to build default framebuffers for a surface
      Framebuffer(rx::SurfaceImpl *surface);
      // Constructor to build a fake default framebuffer when surfaceless
      Framebuffer(rx::GLImplFactory *factory);
  
      virtual ~Framebuffer();
  
      void setLabel(const std::string &label) override;
      const std::string &getLabel() const override;
  
      rx::FramebufferImpl *getImplementation() const { return mImpl; }
  
      GLuint id() const { return mId; }
  
      void setAttachment(GLenum type,
                         GLenum binding,
                         const ImageIndex &textureIndex,
                         FramebufferAttachmentObject *resource);
      void resetAttachment(GLenum binding);
  
      void detachTexture(GLuint texture);
      void detachRenderbuffer(GLuint renderbuffer);
  
      const FramebufferAttachment *getColorbuffer(size_t colorAttachment) const;
      const FramebufferAttachment *getDepthbuffer() const;
      const FramebufferAttachment *getStencilbuffer() const;
      const FramebufferAttachment *getDepthStencilBuffer() const;
      const FramebufferAttachment *getDepthOrStencilbuffer() const;
      const FramebufferAttachment *getStencilOrDepthStencilAttachment() const;
      const FramebufferAttachment *getReadColorbuffer() const;
      GLenum getReadColorbufferType() const;
      const FramebufferAttachment *getFirstColorbuffer() const;
  
      const FramebufferAttachment *getAttachment(GLenum attachment) const;
  
      size_t getDrawbufferStateCount() const;
      GLenum getDrawBufferState(size_t drawBuffer) const;
      const std::vector<GLenum> &getDrawBufferStates() const;
      void setDrawBuffers(size_t count, const GLenum *buffers);
      const FramebufferAttachment *getDrawBuffer(size_t drawBuffer) const;
      bool hasEnabledDrawBuffer() const;
  
      GLenum getReadBufferState() const;
      void setReadBuffer(GLenum buffer);
  
      size_t getNumColorBuffers() const;
      bool hasDepth() const;
      bool hasStencil() const;
  
      bool usingExtendedDrawBuffers() const;
  
      // This method calls checkStatus.
      int getSamples(const ContextState &state);
  
      Error getSamplePosition(size_t index, GLfloat *xy) const;
  
      GLenum checkStatus(const ContextState &state);
  
      // Helper for checkStatus == GL_FRAMEBUFFER_COMPLETE.
      bool complete(const ContextState &state);
  
      bool hasValidDepthStencil() const;
  
      Error discard(size_t count, const GLenum *attachments);
      Error invalidate(size_t count, const GLenum *attachments);
      Error invalidateSub(size_t count, const GLenum *attachments, const gl::Rectangle &area);
  
      Error clear(rx::ContextImpl *context, GLbitfield mask);
      Error clearBufferfv(rx::ContextImpl *context,
                          GLenum buffer,
                          GLint drawbuffer,
                          const GLfloat *values);
      Error clearBufferuiv(rx::ContextImpl *context,
                           GLenum buffer,
                           GLint drawbuffer,
                           const GLuint *values);
      Error clearBufferiv(rx::ContextImpl *context,
                          GLenum buffer,
                          GLint drawbuffer,
                          const GLint *values);
      Error clearBufferfi(rx::ContextImpl *context,
                          GLenum buffer,
                          GLint drawbuffer,
                          GLfloat depth,
                          GLint stencil);
  
      GLenum getImplementationColorReadFormat() const;
      GLenum getImplementationColorReadType() const;
      Error readPixels(rx::ContextImpl *context,
                       const gl::Rectangle &area,
                       GLenum format,
                       GLenum type,
                       GLvoid *pixels) const;
  
      Error blit(rx::ContextImpl *context,
                 const Rectangle &sourceArea,
                 const Rectangle &destArea,
                 GLbitfield mask,
                 GLenum filter);
  
      enum DirtyBitType
      {
          DIRTY_BIT_COLOR_ATTACHMENT_0,
          DIRTY_BIT_COLOR_ATTACHMENT_MAX =
              DIRTY_BIT_COLOR_ATTACHMENT_0 + gl::IMPLEMENTATION_MAX_FRAMEBUFFER_ATTACHMENTS,
          DIRTY_BIT_DEPTH_ATTACHMENT = DIRTY_BIT_COLOR_ATTACHMENT_MAX,
          DIRTY_BIT_STENCIL_ATTACHMENT,
          DIRTY_BIT_DRAW_BUFFERS,
          DIRTY_BIT_READ_BUFFER,
          DIRTY_BIT_UNKNOWN,
          DIRTY_BIT_MAX = DIRTY_BIT_UNKNOWN,
      };
  
      typedef std::bitset<DIRTY_BIT_MAX> DirtyBits;
      bool hasAnyDirtyBit() const { return mDirtyBits.any(); }
  
      void syncState();
  
      // angle::SignalReceiver implementation
      void signal(angle::SignalToken token) override;
  
      bool formsRenderingFeedbackLoopWith(const State &state) const;
      bool formsCopyingFeedbackLoopWith(GLuint copyTextureID,
                                        GLint copyTextureLevel,
                                        GLint copyTextureLayer) const;
  
    private:
      void detachResourceById(GLenum resourceType, GLuint resourceId);
      void detachMatchingAttachment(FramebufferAttachment *attachment,
                                    GLenum matchType,
                                    GLuint matchId,
                                    size_t dirtyBit);
      GLenum checkStatusImpl(const ContextState &state);
  
      FramebufferState mState;
      rx::FramebufferImpl *mImpl;
      GLuint mId;
  
      Optional<GLenum> mCachedStatus;
      std::vector<angle::ChannelBinding> mDirtyColorAttachmentBindings;
      angle::ChannelBinding mDirtyDepthAttachmentBinding;
      angle::ChannelBinding mDirtyStencilAttachmentBinding;
  
      DirtyBits mDirtyBits;
  };
  
  }  // namespace gl
  
  #endif   // LIBANGLE_FRAMEBUFFER_H_